Naval critters may only attack and be attacked by other critters with Naval
Probably needs to be adjusted to avoid being overpowered - since as written, putting up a Naval critter would prevent all non-Naval critters from ever being able to attack directly.
Edit: I checked the rules, and it looks like I was wrong, the rules do explicitly state that a critter must be able to be attacked by an attacking critter in order to prevent it from attacking directly. Still, the below edit is good for clarity.
Naval critters may only attack or be attacked by other critters with Naval. Naval critters do not prevent non-Naval critters from attacking players directly.
An upside to the nature of this game (as opposed to a traditional card game made by professionals) is that you can be a bit looser about how you word things. Like, yeah, it doesn't
hurt to be more precise, but I understood the intention of the original wording, which is the most important thing.
Name: Eminent Domain
Cost: 3 Rads
Effect: Destroy a Sticky your opponent controls and search your deck for an Engine or Station card, then place it on top of your deck. Both of these effects must be valid in order for playing this card to be valid. Your opponent may draw two cards at the start of their next turn.
While unrestricted Sticky destruction is potent, and being able to search up cards is too, this would get a significant buff from me. I'd probably reduce or remove entirely the opponent's card-drawing.
E: (Thought about it a bit more, I wouldn't remove the card drawing entirely, just reduce it. Destroy+search for 3 is too much, it does need a downside)